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← ScienceWhich risk increases when high-pressure hydrogen pipelines experience oscillating temperature variation?
A)Graphite flake formation
B)Anaerobic bacterial corrosion
C)Hydrogen gas embrittlement✓
D)Plasma arc formation
💡 Explanation
Hydrogen gas embrittlement grows when thermal cycling of pipelines accelerates hydrogen diffusion into the structure following Fick's Law; because lower activation energies drive the *permeation process*, brittle fracture is likelier, therefore, rather than surface corrosion, hydrogen accumulates, with sustained loads rather than brief spikes.
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